Preparation method of double-layer film with heated curling and healing characteristics

Abstract

The invention relates to a preparation method of a double-layer film with heating curling and healing characteristics, which is characterized by comprising the following steps: uniformly mixing water-soluble micro-nano particles and a polymer with a high thermal expansion coefficient to form a colloid mixture I, and carrying out silk-screen printing and heating curing to form a polymer hard film I; heating and melting polycaprolactone with a low thermal expansion coefficient and a low melting point, adding thermochromic particles with a low phase change temperature to form a colloid mixture II, and carrying out silk-screen printing and room temperature curing on the surface of the polymer hard film I to form a double-layer polymer hard film; and soaking the prepared double-layer polymer hard film in hot water to form the double-layer polymer hard film with a porous structure on the lower layer. According to the preparation method of the double-layer film with the heating curling and healing characteristics, the preparation method of the intelligent shrinkage double-layer film is provided, the double-layer film is endowed with excellent self-healing performance, and meanwhile the heat insulation and heat preservation characteristics of the double-layer film are guaranteed.

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